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4 years ago

14

How does the structure of the alveoli relate to its function in the lungs

1 answer:

slavikrds [6]4 years ago

8 0

Structure of Alveoli provides more surface area for lungs, to exchange the gases & for process of respiration

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CCL4 is Non polar and NH3 is Polar? Why?

lys-0071 [83]

Answer:

CCL4 is non polar cause' they are equal covalent bonds between carbon and chlorine.
The electronegativity difference between hydrogen and nitrogen is about .9 which is a pretty polar bond. So each N-H bond is definitely polar. But NH3 is also asymmetrical .

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3 years ago

A torque of 12 N*m is applied to a solid uniform disk of radius 0.50 m. If the disk accelerates at 2.6 rad/s^2 what is the mass

VladimirAG [237]

Answer:

mass = 36.92 kg

Explanation:

We have given the torque $\tau =12 N-m$

Radius of the disk r = 0.50 m

Angular acceleration $\alpha =2.6rad/sec^2$

We know that torque is given by $\tau =I\alpha$ here I is moment of inertia and $\alpha$ is angular acceleration

So $12=I\times 2.6$

$I=\frac{12}{2.6}=4.6153kgm^2$

Moment of inertia is given by $I=\frac{1}{2}mr^2$

$4.6153=\frac{1}{2}m0.5^2$

m = 36.92 kg

The given answer is not matched with this answer but after calculation i got m =36.92 kg

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4 years ago

Kelly sits on a rock. Her weight is an action force. What is the reaction force?

Dmitrij [34]

The force ffrom the ground that holds the rock up and prevents her from falling through the gound, unless the ground breaks.

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4 years ago

If a 50 W light bulb and a 90 W light bulb operate from 120 V, which bulb has a greater current in it?

PIT_PIT [208]

The 50 W bulb would have a greater current than the 90 W bulb

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3 years ago

Which two statements are true about redox reactions?

yuradex [85]

Answer:

C. Electrons are both gained and lost

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3 years ago

Read 2 more answers